hello, please see the solution from jscher2000 in the following thread: https://support.mozilla.org/en-US/questions/953639 - he found out that the bank is somehow blocking the firefox 19 useragent. please also report this issue to the support section of the bank...

How can you make a blanket statement that "someone at (US Bank) dislikes open source software" when users of a brand new version of Firefox are having issues accessing the site? This is not the only example of sites having issues with FireFox 19.0.2 and Windows7. It seems clear there is an issue with the particular useragent string that FireFox uses on this new version of the browser, rather than a company targeting open source software. How long will it take for FireFox to fix this issue?

madperson: I see nothing in jscher2000's post that the bank is blocking the Firefox 19 useragent string - he points out that changing the useragent string to mimic Firefox 18 solves this issue. It is clear the issue is with the useragent string of this new version of Firefox, not a company blocking users with a particular combination of Windows7 and Firefox